The girl, who uses the pseudonym "CyFi," revealed a zero-day exploit in games on iOS and Android devices that independent researchers have confirmed as a new class of vulnerability, reports 's Seth Rosenblatt.

Zero-day exploits are used or shared by attackers before the developer of the target software knows about the vulnerability.

The girl first discovered the flaw earlier this year because she was bored with the pace of farm-style games.

While CyFi isn't revealing which games are affected, most of them have time-dependent factors. She opened up the exploit by manually advancing a phone or tablet's clock to force a game ahead in time. Some games block such a trick but the young hacker says she found ways to avoid those detections such as disconnecting the phone from Wi-Fi and making incremental clock adjustments.

CyFi's presentation was part of , a new offshoot of the annual hacker convention that features an area where kids can learn how to do things like open master locks, do certain kinds of hacks, code in scratch and communicate in code.